In order to determine how many kilometers is 2.5 miles, use the conversion factor 1,609km/1 mile.
Multiply 2.5 miles by the previous conversion factor, to cancel out miles units, as follow:
2.5 miles(1,609 km/ 1mile) = 4022.5 km
![2.5\text{miles}\cdot\frac{1,609\operatorname{km}}{1\text{mile}}=4022.5\operatorname{km}]()
Hence, there are 4022.5 km in 2.5 miles